# One-to-One Associations and REST **URL:** \ **Category:** Rails\ **Created:** [March 3, 2007, 1:32pm UTC](https://www.ruby-forum.com/t/one-to-one-associations-and-rest/87528 "2007-03-03T13:32:04Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![ralph](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/r/f475e1/32.png) [@ralph](https://www.ruby-forum.com/u/ralph)\ **Post date:** [March 3, 2007, 1:32pm UTC](https://www.ruby-forum.com/t/one-to-one-associations-and-rest/87528/1 "2007-03-03T13:32:04Z")
Hello, I’m trying to write a piece of code that enables users to upload an avatar. The user code and the avatar code does work great, but now I want to associate the avatar with the user, which should also be reflected in the urls. I’ve read the B-Simple REST tutorial ([http://www.b-simple.de/documents](http://www.b-simple.de/documents)) which explains this process for one-to-many associations. But things are a little different for me, because I only want one avatar per user, I do not need an index action and the urls do look different. For example, I want /user/:user\_id/avatar to show the user avatar, /user/:user\_id/avatar;edit to change the avatar etc. Is there any way to achieve this? ---
**Author:** ![ralph](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/r/f475e1/32.png) [@ralph](https://www.ruby-forum.com/u/ralph)\ **Post date:** [March 3, 2007, 2:35pm UTC](https://www.ruby-forum.com/t/one-to-one-associations-and-rest/87528/2 "2007-03-03T14:35:46Z")
Hi, I’m still finding my way around RoR myself but isn’t what you want something like?: class User \< ActiveRecord::Base has\_one :Avatar, :foreign\_key =\> “your\_avatar\_id\_key”, end class Avatar \< ActiveRecord::Base belongs\_to :User, :foreign\_key =\> “you\_user\_id\_key”, end – Regards Andrew ---
**Author:** ![ralph](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/r/f475e1/32.png) [@ralph](https://www.ruby-forum.com/u/ralph)\ **Post date:** [March 3, 2007, 3:15pm UTC](https://www.ruby-forum.com/t/one-to-one-associations-and-rest/87528/3 "2007-03-03T15:15:46Z")
Hello Andrew, thanks for your reply. Unfortunately this does not help me, because this is for the associations only. I need help for reflecting these associations in my REST enabled urls. Andrew M. wrote: > Hi, > I’m still finding my way around RoR myself but isn’t what you want > something > like?: > > class User \< ActiveRecord::Base > has\_one :Avatar, :foreign\_key =\> “your\_avatar\_id\_key”, > end > > class Avatar \< ActiveRecord::Base > belongs\_to :User, :foreign\_key =\> “you\_user\_id\_key”, > end > > – > Regards > > Andrew ---
**Author:** ![ralph](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/r/f475e1/32.png) [@ralph](https://www.ruby-forum.com/u/ralph)\ **Post date:** [March 3, 2007, 5:47pm UTC](https://www.ruby-forum.com/t/one-to-one-associations-and-rest/87528/4 "2007-03-03T17:47:16Z")
> I’ve read the B-Simple REST tutorial ([http://www.b-simple.de/documents](http://www.b-simple.de/documents)) > which explains this process for one-to-many associations. But things are > a little different for me, because I only want one avatar per user, I do > not need an index action and the urls do look different. For example, I > want /user/:user\_id/avatar to show the user avatar, > /user/:user\_id/avatar;edit to change the avatar etc. map.resources :people do |people| people.resource :avatar end avatar\_url(:person\_id =\> person) # =\> /people/5/avatar edit\_avatar\_url(:person\_id =\> person) # =\> /people/5/avatar;edit ---
**Author:** ![ralph](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/r/f475e1/32.png) [@ralph](https://www.ruby-forum.com/u/ralph)\ **Post date:** [March 3, 2007, 6:00pm UTC](https://www.ruby-forum.com/t/one-to-one-associations-and-rest/87528/5 "2007-03-03T18:00:17Z")
on a similar note, what’s generally regarded as best practice for a REST-ful multi-lingual site, let’s say one which uses Globalize, where the language code has to be passed around in the URL (so that pages can be cached easily per language)? If the first part of the URL always holds the language code, e.g.: [http://mysite.tld/en/](http://mysite.tld/en/)… [http://mysite.tld/de/](http://mysite.tld/de/)… [http://mysite.tld/es/](http://mysite.tld/es/)… How is this declared using resource/resources? An outer map.resource which contains all other route mappings? 3 mar 2007 kl. 17.45 skrev DHH: ---
**Author:** ![ralph](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/r/f475e1/32.png) [@ralph](https://www.ruby-forum.com/u/ralph)\ **Post date:** [March 3, 2007, 9:08pm UTC](https://www.ruby-forum.com/t/one-to-one-associations-and-rest/87528/6 "2007-03-03T21:08:23Z")
DHH wrote: > map.resources :people do |people| > people.resource :avatar > end > > avatar\_url(:person\_id =\> person) # =\> /people/5/avatar > edit\_avatar\_url(:person\_id =\> person) # =\> /people/5/avatar;edit Great, thanks! I guess I should not have missed this blogpost: > **[Rails 1.2.2: SQLite3, gems, singular resources](https://rubyonrails.org/2007/2/6/rails-1-2-2-sqlite3-gems-singular-resources)** > > It’s time for another minor update to Rails 1.2. This was primarily prompted by a change in the API for SQLite between version 3.3.7 and 3.3.8+, which left the Rails database adapter for dead by the road side. But with this release and Jamis Buck’s... One last thing to mention: The avatar controller has to be singular, too. This means the controller name (AvatarController) and the file name (avatar\_controller.rb). I missed the file name first, which took me quite some time to fiddle out…